Here is what the page “Jurassic Fossil Reveals 165-Million-Year-Old Origins of Mammal Milk-Sucking” contains. A new study in Nature reveals that the anatomical machinery for suckling and swallowing milk evolved around 165 million years ago, tens of millions of years before modern mammals appeared. An international team examined fossilized remains of a Jurassic-era mammaliaform, a close relative of true mammals, and identified specialized throat and tongue bones that are essential for the coordinated suckling and swallowing action used by infants today.
The discovery pushes back the timeline for the evolution of lactation and infant feeding behavior, suggesting that even early mammal ancestors may have nourished their young with milk. This finding matters because it resolves a long-standing puzzle about when and how mammals developed their signature reproductive strategy, which is linked to their eventual success across the planet. The full version stays on the original page, which this listing opens directly.